¿Por qué obtengo “ expresión-primaria esperada antes de '. ' token ”?

Sé que esta es una pregunta común, pero la verdad es que cada código es diferente. A veces es difícil aplicar el concepto a tu código, no funciona. Así que por favor ayúdame. ¿Qué tiene de malo este código? Lo obtuve de GitHub. Estoy tratando de compilarlo primero antes de poder hacer un poco modificación, envía datos de temperatura y humedad a los servidores en la nube ThingSpeak.

#include <DHT.h> // Including library for dht #include <ESP8266WiFi.h> String api_key = "YOUR API KEY"; // Enter your Write API key from ThingSpeak const char *ssid = "YOUR WIFI SSID"; // replace with your wifi ssid and wpa2 key const char *pass = "YOUR WIFI PASSWORD"; const char* server = "api.thingspeak.com"; #define DHTPIN 1 // pin where the dht11 is connected DHT dht; WiFiClient client; void setup() { Serial.begin(115200); delay(10); pinMode(2, OUTPUT); digitalWrite(2, 0); Serial.println("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, pass); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); } void loop() { int chk = DHT.read(DHTPIN); float hum = DHT.humidity; float temp = DHT.temperature; if (isnan(hum) || isnan(temp)) { Serial.println("Failed to read from DHT sensor!"); return; } if (client.connect(server, 80)) { // "184.106.153.149" or api.thingspeak.com String data_to_send = api_key; data_to_send += "&field1="; data_to_send += hum; data_to_send += "&field2="; data_to_send += temp; data_to_send += "\r\n\r\n"; client.print("POST /update HTTP/1.1\n"); client.print("Host: api.thingspeak.com\n"); client.print("Connection: close\n"); client.print("X-THINGSPEAKAPIKEY: " + api_key + "\n"); client.print("Content-Type: application/x-www-form- urlencoded\n"); client.print("Content-Length: "); client.print(data_to_send.length()); client.print("\n\n"); client.print(data_to_send); delay(1000); Serial.print("Temperature: "); Serial.print(temp); Serial.print(" degrees Celcius, Humidity: "); Serial.print(hum); Serial.println("%. Send to Thingspeak."); } client.stop(); Serial.println("Waiting..."); // ThingSpeak needs minimum 15 sec delay between updates, I"ve set it to 30 seconds delay(10000); } 

Cuando compilo obtengo este error,

 Arduino: 1.8.10 (Windows 10), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), 4MB (FS:2MB OTA:~1019KB), 2, v2 Lower Memory, Disabled, None, Only Sketch, 115200" C:\Users\Agent 96\Desktop\thingspeak\thingspeak.ino: In function "void loop()": thingspeak:37:20: error: expected primary-expression before "." token int chk = DHT.read(DHTPIN); ^ thingspeak:38:22: error: expected primary-expression before "." token float hum = DHT.humidity; ^ thingspeak:39:23: error: expected primary-expression before "." token float temp = DHT.temperature; ^ Multiple libraries were found for "DHT.h" Used: C:\Users\Agent Not used: C:\Users\Agent Multiple libraries were found for "ESP8266WiFi.h" Used: C:\Users\Agent exit status 1 expected primary-expression before "." token This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences. 

Por favor ayuda, soy una especie de principiante.